First of all, I'm not arguing against your point - I say that hoping you don't misunderstand where I'm coming from. The identifier under your avatar says Baptist, I also grew up baptist; Independent Baptist as a child, then later SBC before converting to Orthodoxy.
I think I understand your point.
otoh, for me; Understanding Augustine became important when I realized that Baptist doctrine/understanding is based in a western/Latin view as it applies to 'Original Sin' and that view is heavily influenced by Augustine. I then found it important to contrast that with earlier views. Does it matter? I think it does, you may or may not.
There are some areas where being '
solely Bible based' doesn't really help very much.
As example, since you are baptist you are likely familiar with debates over Eternal Security. There are baptists on both sides of that debate. Both views have a plethora of scripture verses for support, so both are Bible based.
When I tried to resolve that conflict; I wound up with a different, biblical and historical understanding of Soteriology altogether. That happened because I was able to contrast the various understandings against scripture, with scripture being the most important piece.
Lastly, recognize it or not, there's loads of 'tradition' in baptist doctrine. Eternal security (regardless of which side you adhere to) is one of them. It's based on the understanding of particular interpretations of scripture. It's not that one is scriptural and the other is not. Both views are found in scripture. There's a long list of doctrinal issues that are similar; total depravity? irresistible grace or prevenient grace? contemporary or traditional

(sorry)
It may or may not matter to you but as it applies to the O.P. of this thread, tradition is present whether it is acknowledged or not. Our understandings of, and how we read scripture is often based on the views of those who came before us. That's one form of tradition.