And why isn't there unity to fork bitcoin and increase the block size? There was a Bitcoin Cash fork from Bitmain, that owns Antpool and BTC.com, with aim to increase block size and get rid of stuck transactions, however, people here hate BCH and don't support it, what's the reason?
BCH has 8MB blocksize while BTC has 1MB. If you increase blocksize, considering all the blocks will be filled, it will cost more to run a node which will create less interest in running a full node. The more nodes you have, the more decentralized network it is. Since a node has no monetary gain, people wouldn't voluntarily spend a lot of money to run a node.
Apart from that, it will lower the profit for miners too if I understand correctly. If the profit becomes lower for the miner, the number of miners will be decreased, and again, as philipma1957 said, will be easier to manipulate the fee. Maybe with fewer miners than right now we have, you may see no more 1sat/byte tx because it will be easier to manipulate the fee.