Gas fees in BSC are still lower than eth network but it's a bit higher than before. Actually, it shows the BSC network got more users and more transactions every day. Though the BSC network can process 55 to 60 transactions per second it's not enough when more people are coming every day. So network got more traffic with the same capacity to handle them. That is the reason behind Increasing BNB fees.
I also agree with what you said. behind the increase in BSC gas costs which are getting higher day by day, it is due to the large number of users making transactions with BSC so that the transaction network becomes blocked which results in an unavoidable increase in gas costs, this is the same as ETH in the past. Hopefully in the future with the development of technology, problems like this will not happen again.