It's not about defensiveness or rooting for a standard console strategy, it's simply the factual reality of the present situation, eg that Microsoft is undeniably losing the traditional console race. Whether they're more heavily investing in or prioritising broader alternatives partly as a result of that, we can't know for sure, but it certainly wouldn't be ridiculous to assume as much.
Further to that, we don't actually know how they or anyone else will fare in future with these newer endeavours or as these new adoption avenues (cloud gaming) gain in prominence, and my post was to highlight how even in cloud gaming, it's not necessarily extent of infrastructure that will determine who wins that race or is most successful, but traditional consumer draws like content/games, price, performance and accessibility.
Nobody is going to choose xCloud over PS Now, Stadia or GeForce Now because of the backend infrastructure (at present they all perform roughly the same in terms of latency anyway). Instead it'll be because of other factors and distinctions like the actual content or games, pricing or value proposition, performance or graphics and so on.
But perhaps as
gofreak states, Microsoft might not even care if they lose the cloud gaming race too, so long as they hasten the entire industries move towards it, thus stand to gain more from the leasing of cloud services and infrastructure instead (eg further Azure growth, revenue and profitability).