What I am not ok with though are monopolies, lock-ins and influencing education. There is no excuse to teach/use/promote any of the propriety software in schools. There is no reason to use any of that in government institutions. If one vendor has so prevalent position that there is no (or almost none) alternative then it's a monopoly and it's time to deal with it using antitrust laws (which by the way aren't nearly strong enough these days). If there is no free alternative developing it is great project for government to sponsor.
If people not force-feed Excel, Word, Photoshop, Matlab etc. during their education days still want to use that for convenience later in their career - let them. Just give them real choice by educating them with open tools.