But There doesnt seem much more to it than spinning the reels or pressing one button.

That is perfect explanation of what slot is.

Does anyone know of any slot strategies people use?

Such strategy doesn't exists.

Is there such a thing as a professional slotter haha.

Hm. There are people who are chasing slot jackpots but professional slot player? Don't think so.

OR is it really the most heavily dependent on luck gambling game ?

Yes! 100% luck game!

There's still a little bit of skill applied(maybe 10%) to playing slots like swapping bet amounts after 5-10 bets kinda similar to dice.

Skills in slot? You can't be serious.

harder to analyze than dice and roulette

You can't analyze dice, roulette, slot or any other gambling game which is completely based on luck.

Many people believe that playing slots is one of the simplest forms of gambling

Because it is. Dice is another one, roulette is also simplest form of gambling and every other luck based game is very simple.

there is also strategical thinking involved when playing slots.

Such as?

Because most players do not understand how to win at slot machines

What is there to understand? Hit the button and wait for the result!

the theory that no strategies are needed to win.

This is not theory. This is the fact.

Yes, luck plays a huge role in slot successbut slot machine strategies can maximize your chances to win.

Nonsense. Luck is only thing you need.