The reverence that Thai people have for this King is no joking matter. They take their monarch deadly seriously and it seems fair to let them honor the King as they see fit without a lot of outsiders casually weighing in with half-baked opinions.
I'm American and there are people from all over the world casually weighing in about America on HN. That's totally OK. Let's not have a double standard and let's be free to have opinions about other peoples' royals.
The monarchy is (almost) completely separate from the political system. While many people might debate the pros and cons of the Conservatives versus Labour, UKIP or liberal democrats, very few question the role of Queen Elizabeth II.
In the UK, the monarch has the the right to veto legislation passed through the parliament but this right is rarely exercised. This is quite different to the US system where the president is ultimately in charge and has to fight for re-election every few years.
It sounds like the monarchy in Thailand has strived to maintain stability for the people in spite of an unstable political environment. This might explain why the people continue to believe in the monarchy in Thailand in a way which seems alien to anyone in the USA.