If it's just to spite the others then I'd feel like yes, but in some cases, the existence of 3rd party exclusive content is there because it can give prestige and a window for the game to be showcased (by example stuf like Nier: Automata, Astral Chain, Octopath Traveler). It'd be great if they were available for all platforms but this could undermine the intial impact it has on the market and thus get overshadowed more rapidly than if it were the shining beacon on a single platform.
And then, there's Bayonetta 2/3 which are financed by Nintendo, this saved the franchise from cancellation so it was obviously all good and justified.
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