...One's views on prophecy are irrelevant to one's salvation...
I believe one's views on prophecy could take on relevance to one's salvation in the future.
I believe knowing the rapture's timing is important because Jesus said it's possible for those who believe to subsequently "be offended" by tribulation and "fall away":
"The same is he that heareth the word, and anon with joy receiveth it; Yet hath he not root in himself, but dureth for a while: for when tribulation or persecution ariseth because of the word, by and by he is offended" (Matthew 13:20-21).
"Then shall they deliver you up to be afflicted, and shall kill you: and ye shall be hated of all nations for my name's sake. And then shall many be offended, and shall betray one another, and shall hate one another. And many false prophets shall rise, and shall deceive many. And because iniquity shall abound, the love of many shall wax cold" (Matthew 24:9-12).
"They, which, when they hear, receive the word with joy; and these have no root, which for a while believe, and in time of temptation [peirasmos] fall away" (Luke 8:13).
"Beloved, think it not strange concerning the fiery trial which is to try [peirasmos] you, as though some strange thing happened unto you: But rejoice, inasmuch as ye are partakers of Christ's sufferings; that, when his glory shall be revealed, ye may be glad also with exceeding joy" (1 Peter 4:12-13).
I believe Jesus told us everything we'd have to face beforehand for a good reason, so that we would be less likely to be offended and fall away: "Take ye heed: behold, I have foretold you all things (Mark 13:23). "My people are destroyed for lack of knowledge" (Hosea 4:6). To be forewarned is to be forearmed: mentally, emotionally, and spiritually (and possibly even physically, if the Lord so leads).
I believe the pre-trib doctrine could be setting up many in the church for great disappointment and confusion and the falling away from the faith: "The Spirit speaketh expressly, that in the latter times some shall depart from the faith" (1 Timothy 4:1), and this departure from the faith will happen before Jesus comes to rapture us: "We beseech you, brethren, by the coming of our Lord Jesus Christ, and by our gathering together unto him... Let no man deceive you by any means: for that day shall not come, except there come a falling away [apostasy] first" (2 Thessalonians 2:1, 3).
...I don't think prophesy should be overlooked by any means but when it clouds our view of the real purpose of salvation...
Some people think it's a "heresy" to believe the wrong thing about the rapture's timing. But I don't believe eschatology itself can be heretical because a heretic can't be saved (Galatians 5:20-21), and we aren't saved by our eschatology (Romans 10:9-10).
But I do believe that a wrong eschatology can lead to the changing or the inventing of other doctrines in order to conform to our eschatology. Pre-trib doctrine can define salvation to include being saved from the tribulation. When it's pointed out that a great multitude of saved Christians will be in the great tribulation (Revelation 7:14), it then must define the church as only those saved before a pre-trib rapture; after that it's only Israel and an invented class of believers called "trib saints." Then we get into the problem of Christians "from every nation" (Revelation 7:9, 14) saved after the cross and after Pentecost (i.e. not OT), who are outside of the church, when Paul said there was only one faith and one body (Ephesians 4:4-6).