Strzok texted that 3 months before anybody knew about the Trump Tower meeting. IIRC the senate intel committee learned about it from the times in July, not a huge leap to think that the non-existent special counsel didn’t know about it yet in March.
It’s kind of remarkable, if Trump hadn’t fired Comey a lot of this stuff might never have come out or been discovered.
Setting aside that Solomon is a partisan hack that regularly bends, if not breaks, the truth and like here denies important context to his partisan narratives, that comment is I guess still kind of interesting. Though a bit less so in it's total context:
"You and I both know the odds are nothing," Strzok said in a text to Page on May 19, 2017. "If I thought it was likely, I'd be there, no question. I hesitate in part because of my gut sense and concern there's no big there there."
From what I can recall about Strzok is that he primarily worked on the Hillary email investigation(the right's second favorite conspiracy about the guy pertains to his successful lobbying to change the wording of Comey's stupid fucking statement about Hillary's emails) but that he was involved in some of the early Trump/Russia stuff, including the initial Papadopoulos drunken bar tip off. So we do know he likely had at least a decent level of knowledge about the case. But like you said, some of the major developments seemingly hadn't occurred or been broken within the investigation at that time. The focus did seem to be with low level players and maybe Manafort/Flynn. Which is echoed by Comey's testimony up until his firing.
Personally though, I think the "nothing-burger" narrative is a hard one to swallow at this point and you have to ignore a fuck ton of public information, behavior, and tea leaves to think this isn't going to touch at a minimum, very close to the president, regardless of what Strzok thought at the time. Including indictments to members of his inner circle and family. The Don Jr. call to the blocked number alone is almost certainly going to be a connection that at least puts Trump's knowledge of the meeting into play. Don Jr's solicitation and Roger Stone's behavior with Guccifer, based on what is teased in the indictment, at a minimum will definitely lead to some charges for Stone, for Don Jr., highly likely.