I don't think it's true that epidurals "lead to" interventions, necessarily. But it's the women having long and difficult births who are more likely to get an epidural.
For example, several of my friends asked for epidurals but didn't get them, as there wasn't time. The baby was out before the epidural would have been in place.
By contrast, I asked for an epidural around 15 hours into labour and got one. By that point I'd spent a full day in and out of the water pool, on the birthing ball etc, I was in agony and things weren't progressing. DS ended up coming out with forceps - but he was stuck and wouldn't have come out without intervention, regardless of the pain relief I had. It was that or a section.
If I were to give you any advice it would be to go with the flow on the day and not try to put pressure on yourself one way or another.
Yes, interventions aren't great, but it's not like you'll be given a straight-up choice between ventouse, forceps or a "natural" birth - interventions are used in difficult circumstances which you will most likely have absolutely no control over.
Forceps were absolutely the right thing for me at the time, as was the epidural. And I say this as someone who prepped at length for a drug-free hypnobirth in the water.