Las,
See Magen Avrohom there that the Maharil does not exactly permit it. And there other Rishonim in Eruvin that clearly forbid it.
My point is the very fact that there are shitos that do not allow an Eruv Techuman for the sake of minyan, indicates that iy is not exactly a chiyuv, and one may travel without a minyan
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However, there is of course the issue that even if it’s permitted you still losing out on all great inyanim that minyan tefilah has to offer, that your prayers are answered even without total kavanah etc..whereas beychidot you need total kavanah etc..