You can certainly disable it – with a single line of code that can be added to your theme’s functions.php file or to a custom plugin:
add_filter( 'tribe_events_add_no_index_meta', '__return_false' );
Is there a reason the month view is set that way?
Everyone has different SEO needs and we are continually adjusting facets of the plugin like this one as, of course, the way search engines behave is also continually changing.
I believe this adjustment was originally made because of a perceived problem with what are sometimes termed “soft 404s”. Really, though, how search engine optimization looks in practice varies from site to site and according to the amount and distribution of data you have within your site. In essence: do what works for you.