Whenever the demand is greater than the capacity, some transactions will inevitably be delayed.
No, if the price can adjust then demand will always equal supply. What kind of professor are you?
The price for fees can change, more wallets need to implement this feature tho. That is all that is needed for there to be no queues.
No, that doesn't make any sense. If 200 people want to take the bus but it only has 100 eats then it doesn't matter what the ticket price is - there will be 100 people that will be delayed getting to their destination. The only option you are talking about is that 100 people who really want to take the bus now are forced to take a taxi - aka, use something other than Bitcoin. While this is possible, it is also bad for growth when done by artificially taking seats out of the bus for the purpose of forcing ticket prices higher.
TLDR; Limiting the block size for any reason other than technical scalability reasons is a bad idea.
If the ticket price increases only 100 people will want to take the bus not 200 so there will be no queue.
Thats how economics works everywhere for everything. Using your reasoning everything on earth has a unlimited queue, from tomatoes to busses, to bitcoin now, cause if the cost to buy bitcoin (or any other product or service on earth) was lower more people would get it.
With all due respect thats absurd, thats not a queue by normal definition.
And there is nothing artificial about it, in the same way that busses can only hold so much people and there is nothing artificial about that.
To go with the bus analogy, in my eyes you want to design a bus that holds 800 people (i.e. 8GB blocks) I find thats too much and think the design should only allow for 200 people. There is nothing artificial about a limit in the design of a bus.
Its a characteristic of Bitcoin, its no more artificial the 21 million limit which is also just another characteristic. The second one is held more sacred tho.
It's more like 200 people showed up to take the bus but when the time came to board the bus, they found out that the price was too high so they were forced to wait for the next bus. Eventually, as you say, less people are interested in taking the bus and go to another bus company. During volatile demand times, you will not know what the price is to get on the bus now - you will pay your fee and maybe if your wallet allows for you to increase the fee you'll be able to change your mind later.
Let's get one thing out of the way - the 21 million limit is completely arbitrary since any number would have worked. 1BTC would have been no different than 1 trillion BTC.
Block size is not as arbitrary since it limits the number of people that can use the system. And yes, in 20 years I think 800 person busses is something to expect. Either Bitcoin is a payment system many people use or else it's a settlement system accessible by only the super wealthy individuals or coinbase style banks. Block size needs to grow as much as it technically is possible to grow without much regard to fees, at least short term.