is finding someones email address still worth the effort?

Catch with verifiers: a lot of company domains are set up as catch-all, so every guess comes back valid or unknown whether the person exists or not. For those, check whether they've published the address themselves somewhere - an author bio, a podcast page, a speaker list for some event. Slower, but you're not gambling with your bounce rate.

For outreach, yes, a named person beats info@ every time. Most companies use a pattern like firstname@ or first.last@, so find one confirmed address and you can usually guess the rest. Run it through an email verifier before sending though, bounces hurt your sender reputation. Keep it relevant and personal. Mass cold emailing scraped addresses gets you into spam folders fast, and in the EU it can be a legal problem too.