This brings us to what's causing the current ongoing issue of high fees. It's not high demand and it's not miners wanting to charge extra for "keeping the chain secure".
As I explained in the first post and multiple times in the topic, this is a comparison and refers to the period where there will be no more reward,
Well then you picked a very weird time to make this post. We're facing very high fees as bitcoin users in this moment, which as you're rightly pointing out is pricing out many bitcoin users and provides counter-incentive to use bitcoin for most types of normal transactions.
So saying that bitcoin is absolutely bound to have high fees due to it not having tail emissions, while true, isn't something that would have to be discussed now. Maybe after 2 or 3 more halvings? But that's years away from now. Even based on this logic, we don't NEED to have big fees neither now nor at any point in bitcoin's usage. If the capacity for transactions was simply increased, more people could be paying fees, albeit smaller, but this increased capacity would eventually balance out to higher fees in total.
So really the solution of providing incentive to keep the network secure even after emissions in the form of block rewards end, the simplest solution to provide miner rewards could just be making it easier for more transactions to happen.