News coming out of places where omicron was first observed, like South Africa, indicates that Omicron is more like a common cold for the vast majority of people who catch it. I'm one of those people for me it was just a cold and was over in a few days.
Omicron is good news - it only causes mild illness, and because it's so contagious it's displacing covid strains that can cause more serious illness - for example Omicron now accounts for 90% of new cases in the UK. Due to the rapid onset and shorter course of Omicron, isolation periods are being reduced to just five days after a positive test in the US, seven in the UK, ten in Australia, and zero days for asymptomatic but positive cases in South Africa.
Unless a more virulent strain that's more transmissible than Omicron appears very quickly, the pandemic is thankfully nearing it's end.
I hope that Thai authorities accept that Omicron is unstoppable sooner rather than later.