An entirely responsible decision. Targeting a specific yield forces yourself (or your fund manager) to venture into iffy stuff just when the markets become unstable.
I’m with Warren Buffett on the topic of dividends – go for growth; if you need regular dividends, create your own by selling some of your portfolio.
It might help managed portfolio investors develop this sort of mindset if the growth portfolio’s very useful projection tool caters for something like this – something like allowing a negative monthly/annual contribution, either by pound value or by percentage.