We do have to worry about it. If it is the case that NP <= P/poly, then PH collapses to sigma P 2. Unless there have been recent results that show otherwise, P/poly might even contain NEXPTIME.
Regardless, the connection to P in this paper is not immediately obvious to me. It certainly is not explicitedly stated in a form that I even partially recognize.
Because of these reasons, I am deeply skeptical of the leap directly to P != NP. A lot of incorrect papers do something similar: They show a lot of very complicated constructions then, BAM, Collorary. P != NP. It kind of hand waves the most important step.
Regardless, the connection to P in this paper is not immediately obvious to me. It certainly is not explicitedly stated in a form that I even partially recognize.
Because of these reasons, I am deeply skeptical of the leap directly to P != NP. A lot of incorrect papers do something similar: They show a lot of very complicated constructions then, BAM, Collorary. P != NP. It kind of hand waves the most important step.