Bitcoins current budget is sufficient at about 1.6% (= 8B USD) annually. After next halfing it will be about 0.8%, similar to Monero’s budget. In 2032 it will be about 0.2%. If Bitcoins price doesn’t increase, the budget would only be 1B USD; if it does increase, a 4T mcap would be secured by still only secured by 8B. Either way, the more time passes, the easier Bitcoin becomes to attack. How much longer do you think bitcoin will last?
The (original) selling point of crypto is that it can’t be manipulated, even by nations with practically unlimited power and funds. Side chains sacrifice some of the immutability for other aspects and are a at best workaround instead of solution. So far there is little evidence to show that transaction fees will one day make up for the loss in block rewards.
The primary competitor to Monero is not Bitcoin, but gold, whose inflation sits at about 1.5%. Proponents of tail emission have long left bitcoin, and rather contribute to a project which aligns with their views. The remaining crowd will therefore be biased, don’t take their word as gospel.