The issue isn't really the likelihood of getting covid, you can get covid anywhere.
There are three issues for me.
If you do get covid and there are complications you would rather be here in Australia with support of family and friends and access to our hospital system, rather than stuck in Thailand.
The hassles involved when you get there and when you come try to come back, and all the rules you have to follow. And the fact those rules can change overnight and ruin your holiday.
Most importantly for me the fact that you can't have a good time like you used to in Thailand.
Many bars, Go Gos, Walking St etc are closed, many of best the girls have gone back to the villages, there are lots of restrictions on drinking, socialising etc.
If you really need a Thailand fix then yeah go for it and all the best, but I reckon it's worth waiting for now.