you can but they may ask, i have been doing 2 weeks every month in Thailand for more than 6 years (except during covid) never ever got stopped and asked why i come so often, i always had a return ticket booked maybe they knew that. I have now got the OX visa which covers me to come and go as often as i like as i admit i was concerned they may ask and the visa was only $600 so worth it to avoid the questions.