It's not up to the bureaucrat but to the courts. The FTC doesn't "approve" or "reject" deals--it can just take legal action to try to stop a deal, but that still gets adjudicated either in a federal court or in an FTC administrative law court to a judge which is appointed independently.
https://www.ftc.gov/enforcement/merger-review
https://www.ftc.gov/legal-library/browse/administrative-law-...
Depending on specifics, the EU stopping blockbuster acquisitions in the US startup ecosystem feels ripe for abuse.
FWIW, I think there are good reasons to limit tech consolidation, including this one. But anyone should realize that it will reshape the industry in unpredictable ways, including some that harm "real" consumers and builders.
If anything, IMHO, we've been too lenient with anti-trust in Tech in particular over the past 5-10 years. This just dials things back a little, and makes it so that "hard to quantify" risk is a little more likely than it was before, and certainly a little more likely than zero
I don't think Adobe / Figma specifically is an "otherwise obvious deal" precisely because it has such obvious anti-trust risk. The fact that this merger was even announced is all the proof I need that we were being too lenient. Figma can still sell to any number of huge Tech companies
Blocking acquisitions creates precedents.