That last statement is meaningless, 2017 & 2018 were in "normal" times.
Hardly a celebratory matter to have an economy recovering at a snail's pace from COVID.
The World Bank has already downgraded the 2022 forecast to 2.9% as well.
So, with a -6.2% contraction in 2020, only 1.6% growth in 2021 and let's say 2.0%+ growth in 2022, it's going to be (at a minimum) 2023 before we return to pre-covid GDP and quite possibly this could slip into 2024.
With regards to the old chestnut about the importance of tourism to GDP, I find it challenging to reconcile the overall 2020 and 2021 GDP numbers (when international tourism was largely non-existent and with other significant negative impacts on the Thai economy) to a hugely significant tourism GDP contribution. So either the GDP numbers are fudged or international tourism is not the 10+% of GDP that it is claimed to be...