For now Monero seems to have its tail emission right, but I don't know the details well enough, hence I may be wrong. And they've had this from start too.
Yes, you're wrong; they didn't have tail emission planned at launch. It was a hard fork.
Your statement can be rephrased as "nobody likes their share of the pie to be decreased".
I can rephrase it further: Bitcoin users don't like their share of the pie to be decreased in some obscure way.
They don't like any departure from the 21M bitcoin limit. Which makes perfect sense.
Bitcoin has always been branded as the ultimate hard money, because of its immutable supply cap.
Once you start changing that, then it's hard to take any claim seriously. Like Ethereum's "code is law",
but worse, since that was never part of Ethereum's consensus model.
So agree with them. Bitcoin is stuck to the 21M limit no matter what. It will just have to find some way other than tail emission to deal with the future uncertainty of having periods of precariously low miner incentives.