At some point in the future the natural gas supply out of Burma by pipeline feeding the electricity generating plant in Ratchaburi Province will expire. That plant is a significant contributor to Thailand's grid. The NG supply from the Gulf of Thailand exploited since 1970 is finite. Fossil fuel imports too are unreliable.
Wind, solar and other forms of generation can be regarded as contributors to the grid but not main suppliers.
The inevitable increase in demands of EVs alone has to be met and Thailand has no option but to consider alternative practical sources of generation one of which is the SMR.
Just my thoughts.