My main involvement (well back from the supporting sidelines) with Pfizer was in their clinical studies. I imagine people a bit like my former colleagues (who did work for most of the companies[1] like Pfizer, Novartis, Sanofi and Merck, to name some of the still-big names in the business, even while we were a small independent concern with barely two-score employees spread across a handful of UK offices) have been doing much of the data-crunching. On the other side of the 'sponsor' I imagine that there are many of independent or semi-independent small labs doing the same in bringing candidates to fruition, especially towards this moonshot project where probably every lab of postgrad biochemists would love to get their teeth into this problem, but it would need Pfizer/the rest to amplify any progress gained.
Also, they and their partners (and the others and their partners) should have the experience to stop problems like that which befell TeGenero, even with expedited phases of testing. So long as the FDA/MHRA aren't being over-pressurised by anyone, that's another thing I'd be relying upon. (Not so sure about non-'western' regulators like Roszdravnadzor and whatever the local Chinese equivalent is. They're doing things, I know, but it's sometimes hard to know what exactly.)
To this extent, I don't really care if it's Pfizer's own waged lab technicians or not. It's the whole thing that matters and I imagine there should at least be credit where its due even if some Rosalind Franklin figure never gets the full public acclaim.
[1] Stretching Bback before GlaxoSmithKline was still separately Glaxo-Wellcome and SmithKline-Beecham, and in fact back before then when Glaxo and Wellcome and SmithKline and Beecham were all separate and mostly competing companies who still sent work our way. All those jokes usually told about the PriceWaterhouseCoopers type of ineffibly diverse accountancy/management/advertising firms merging their various names were also quite obvious to us in our field. Well, definitely anyone who had an admin's-eye view on our whole backup and archival system logs and saw various directory names hyphenating and changing every few years as greater or lesser degrees of cooperation occured due to specific projects or overarching aquisitions.