No one will be forced to use the lightning network. LN will reduced blockchain bloat and lower fees, even for the people who will never use it.
Of course people will be forced to use Lightning Network. Nobody is going to pay $200 in fees for a $200 item, thus doubling the item's price. When I did calculations a long time ago, I think my numbers were that even at 8 MB block size, only transactions of something like $5k-10k would be viable on-chain if bitcoin had any decent market penetration. Anonymint's number were WAY WAY higher than mine for how high fees can go, but I don't know if his were rational or not since I didn't really check them.