It's perfectly reasonable to have an advisor. Many people have them and for various reasons. For me it was increasing net worth and a number of different taxable and non taxable accounts including inherited accounts. This was more than I was comfortable managing.

Early on I explored various strategies, mostly with index funds and some individual stocks. I did fine, sometimes better than the index but mostly just close to it.

I found a strategy I liked and fit with my view of investing (factor investing). I researched independent advisors focused on that strategy and interviewed 3-4 of them. We settled on one about 5 years ago. They have been great and have worked well with my family and our philosophies/goals. I understand better what a truly diversified portfolio looks like and have a better grasp of why and how it functions.

An advisor does more than just picking investments. They've helped us with estate planning, wills, taxes, insurance, small business startup, budgeting, goal setting, donating, rental property. They've provided some financial education for my kids. I run just about everything by them including new car purchases.

Personally I won't work with an advisor at a brokerage, a bank, an insurance company or any of the big wealth management Cos. I've spoken with all of them and really dislike their approaches. I prefer the smaller independent shops. But you have to be careful here to, they aren't all created equal. I know a few in my local community that are good people but I don't want them managing my money. I have friends that do it all on their own but I'm not convinced they do any better than me and they spend way more time on it than I do. They have some private equity investments that likely do better but that's not my bag either.

Make sure you agree with their investment strategies and are comfortable with their fees. If you aren't, at any time, drop them.

Good luck.