Blobbing is the easy way. You can play very effective with a relatively rudimentary micromanagement. From this perspective, yes, blobbing is the noob way to do things. Sometimes a better play might lose because his enemy chose the easy way an blob and thats frustrating. Furthermore a game without blobs is a pleasure to watch from my perspective.
In CoH1 Brits and PE benefit from blobbing. On the other hand MG´s are a fairly effective way to stop such a blob. I think there are no boni for a blobbing player in CoH2 (besides the easy way thing mentioned above) but there is also no blob stoping unit like the MG.
You know what ? Hitler used Blob with Rommel's Tank for smash the France, they won because all their tanks were regroup on a same point and french's tank not.
Reality unequal game mechanics. Your argument is invalid.
Besides that it was not just about the tanks, it was also about the combined arms tactic and the Mission-type tactics the Wehrmacht used.