You can apply for either route! If you are confident that your evidences and achievements are exceptional enough for Talent, go for it.
It also depends on the assessor: quite a number of people with 5+ years experience have been assessed and endorsed for Promise, because they gave convincing reasons on why they applied for that route despite their years of experience.
However, I don’t think the Promise route being a “safer” option would be a valid reason, and it definitely doesn’t guarantee endorsement.
Here’s a recent example from someone with >5 years experience, applied for Promise and was assessed on Promise route because they gave a valid reason.