Quite strict to be an embassy in Europe. Normally the first nights or a week is sufficient. But they have the right on their side, and it’s no other way around a tourist visa than already mentioned.
Another “short cut” could be to just skip the tourist visa. Do a 30 days visa exemption and a 30 days local extension at your immigration in Thailand. You’ll need a cheap onward ticket out of Thailand within 30 days in case your airline will ask for it, but you won’t get any questions regarding accommodation unless you should get pulled aside by the immigration in Thailand for some other reason regarding your travel patterns.
Normally it’s ok to have an onward ticket within 90 days on a tourist visa. It’s just some strict embassies/consulate that will require 60 days, as an example Penang in Malaysia.
Pointless comment. You are still respecting the system and the laws of the country by using the right they’ve given you to apply for a 30 days extension on a 60 days visa.🤷🏼
They can deny you boarding because formal requirements for entering Thailand are not fulfilled and they can be fined and responsible for your return. Do you think they’ll deny you just for their own sake?