So? Firstly, having tanks in an army does not mean they are organized into offensive, mobile units. The French created and trained the czechoslovak army in the 1920s, and at that time, tanks were infantry support weapons, intended to lead infantry attacks across enemy trench lines, to accompany the infantry during any offensive operations, and to serve as local counterattack force for infantry on the defensive. There was no thought of organizing tanks as a double purpose breakthrough and independent exploitation force.
Secondly, if a country's armed forces have not devoted considerable (!) time into planning offensive operations, and creating the support structures that enable the kind of extreme force concentration that you need to create localized force superiority, then that country's armed forces will not launch offensive operations of any kind even against minor resistance. You need a huge motorized supply force that is both highly mobile and directly under the theatre command that is supposed to coordinate the offensive. You need to practice offensive movement and teach the division and corps commanders to move forces quickly through very constricted terrain, while under enemy fire, and not get into each others' way. This is very difficult and unless you have practiced it, your army is not going to just organize an offensive into defended enemy territory when it's necessary.
For what it's worth,
here's a bit of a discussion from reddit's "ask a historian" forum, about the czechoslovak defense preparations. The listed sources are all in Czech, so unless you speak Czech you just have to either accept their description or choose to not believe it. In any case, if you read it, you'll notice it speaks a lot about how the Czech army imagined that the defense of the country would take place. Attacking into Germany is not mentioned except in a short statement that in the 1920s there were ideas that if the Germans acted up, the Czechs should attack west from Bohemia towards Bayreuth, and link up with a French army attacking across the Rhine river and marching east along the Main. Fat chance of that happening any time soon in the 1930s. For the planning in the mid 1930s it has no mention anywhere of an offensive into Germany, instead it's all about how they thought they would slowly trade space for time retreating eastwards from Bohemia into Moravia. That's not the planning that an offensive minded army would engage in. To me, it does not indicate that a Czech attack into Germany was in the cards. It sounds like the Czech tanks remain held in reserve behind a defensive line that the Czechs would try to stretch all along their enormous border.
Incidentally, it also describes how woefully incomplete the mythical Czech bunker lines actually were, and how pathetic the state of the country's defense actually were in 1938.
I repeat my assessment that the Czechs did the correct thing for themselves by surrendering after France and UK had withdrawn their promises of support against Hitler. Their position was utterly hopeless, and not even a Soviet offer of support could have changed their hopeless situation.