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.
Tail supply can be used to hide the fact that users lose their "share of the pie". It is not instantly obvious to everyone. But if you introduce any fee policy, when it will be required to send some of your coins directly to the miners, or your coins will stay unconfirmed if you won't adjust to the rules (so the final effect will be the same as if they would be burned), then it is crystal clear that tail supply is taken from all accounts and given to all miners. It should be crystal clear from the very beginning, that tail supply supporters want to take single satoshis from everyone, and make a new block reward out of it. And all details would then be only about the whole algorithm that will decide, how many coins have to be taken from each account.
My point was that it's hard to get tail emission right.
Yes, and because it is hard to do it right, then it should be solved by Merged Mining. You want to get new coins? No problem, just mine Bitcoin, and get Bitcoin and BitcoinWithTailSupply at the same time. Then, you will get additional coins outside of the chain, and then all users will choose, which coin they want to use. But I expect that BitcoinWithTailSupply will have many problems, and will sooner or later burn some coins, because of overproduction. It is hard to get all amounts right, so it should be dynamically adjusted, for example by Merge-Mined sidechains.
You want more coins? No problem, just create a new Merge-Mined altcoin, and distribute coins, based on Bitcoin shares. You want less coins? Then it's even easier: just burn them.