What does throw under the bus mean in this context? There have been other groups who lived through the 1950s who's life's been improved after the 1950s, are you prepared to throw them under the bus too? If that is the criteria used.
I guess you were just a little hyperbolic, but I want to point out that LGBTQ+ persons can be something around 8-16% of the Democrat voting bloc. My napkin math: 5-10% of the population self identifies as LGBTQ+, 80% percent of them votes democratic (so 4-8% of the total), republicans and democrats are basically split down the middle so 8-16% of democrat voters. It can be wildly off, just food for thought, but there is probably some kind of trade-off here.
...the numbers you provided have to be counterbalanced against how many potential democratic votes the party is losing as a result of how much "bending a knee" they've done for the LGBTQ+ activists and trying to meet their increasing list of demands.
We know a few things about the population as a whole based on polling.
(based on Pew research and gallup polling)
Gay marriage: 69% of Americans support
Gay couple adoption: 63% of Americans support
Employment & housing anti-discrimination laws for LGBTQ people: near 70%.
On other aspects of the "T" in LGBT, you've got around a 50/50 split on some of those (bathrooms/locker rooms/should you be able to change the sex on official licenses and documents)
It's when you drift into the other topics (some of the very new ones that pertain to the rest of the letters of the acronym after the LGB), that's where Support numbers fall off a cliff for some of those topics
Support for allowing transwomen to compete in women's leagues for sports: Only about 25%
64% of people say parents should make the final call on gender affirming care for minors (while only 12% say lawmakers should dictate policies on that) -- meaning, most people are still of the mindset of "It's my kid, and I'll make the final decision on this, not some social worker, counselor or legislator"
The non-binary thing (and the pronoun demands that go along with it) isn't popular at all outside of certain progressive bubbles.
Only 22% favor insurance mandates and public funding for gender transition treatments (even among Gen-Z'ers, that number is only at 37%)
So you basically have some things that are popular, and some that are unpopular -- but being presented as if they're one big package deal "you have to go along with all of it"
But here's the big one, and it pertains to the "rate of change that's happening"
53% say views on issues related to people who are transgender or nonbinary are changing too quickly, while 16% say things aren’t changing quickly enough and 28% say the pace of change is about right.
Now, people are entitled to their opinion, and they make think that those 53% are just old fuddy duddy Archie Bunker types who need to "get with the times"...
But in terms of pure political strategy
If 53% of the population says "this is shifting too quickly we're not comfortable with this"
And 16% says "to heck with their comfort, they just need to deal with it...full speed ahead!!!"
One can certainly see why that's a strategic blunder for a political party to side with the latter.