President Benes urged all Czechoslovak citizens and military personnel to remain calm and not violently resist the invasion because he believed it would be hopeless. We see the same approach being taken by Alexander Dubcek in 1968 as well.

In both instances, you are correct, the Czechoslovak military was quite equipped (and in 1968 was really the military non-soviet jewel of the Warsaw Pact) but the civilian government chose to submit passively to clearly superior opposition to avoid the horrible bloodshed which followed in, say, Poland in 1939 or Afghanistan in 1979.

the Czech lands were absorbed into the German economy and a separate Slovak state was set up as a German puppet, so this essentially made Bohemia a cog in the wider continental German economy, but a crucial one at that due to its high degree of industrialization. The most important result would be the loss of sovereignty and the inability to make independent economic and political decisions. Instead, the Czechs were simply incorporated into the German "großraumwirtschaft," or "large scale economy."

Edit: typo

It is true Czechoslovakia did have a pretty good military, a defensive position and a chance to block the German attack for a while.

The Sudetenland by itself is not very important, except that it would mean the enemy has passed lots of their fortification making defense much weaker.

Its more about the politics, once the British and French left them for themselves all their neighbors gang up on them Hungary and Poland both wanting a piece and then the Slovaks going there own way.

Going from fact to analysis I think the Czech state made two mistakes. First, like almost everybody, they overestimated the German military capabilities. The German could have won eventually but maybe not in a lighting victory easy achieved. That means you earn yourself time to work develop your strategy. For the Czech Strategy basically means getting the West into the war.

Second, the Western democracy are generally pretty easily influenced when you have good footage of a German solider killing a baby or something like that. Had the people of Belgium not resisted during WW1 Britain might not have committed. The Czech essentially surrendered when they still had a shot of participating in German defeat. I would also argue that it might have forged the country together.

The German resource base and financial situation was terrible. If the Czech could have guilt tripped the West into a blockade the Germans might have still won but they would be finished utterly finished. Without the Molotov-Ribbentrop pact they could only fight one real campaign in the east.