Actually, they could, however, in world where most (Western) #AI companies are based in a jurisdiction which, since 2010, has ever more become a plutocracy and where (as was pointed out here only recently) hundreds of billions of dollars have been burned in search of ROI, this is not going to happen on a sufficient scale.
Besides, and I realize this is a minority opinion, IMO the point where a singularity within the next couple of years can be avoided, has been passed.
I did some...