That all depends on your publishing goals, as traditional publishing is a great option for some authors, and not the best for others.
For some authors, traditional publishing is an ideal choice because of the reach, exposure, and infrastructure provided with a big publisher. Authors don't have to worry about marketing, promotion, or the cost of offset printing and distributing a book. Traditional publishers often have established relationships with booksellers, which can be a great advantage.
On the other hand, authors who want to retain full control over the book’s content, format, and timing of publication may want to look at self-publishing. This option requires more work and cost upfront, but is a more hands-on approach and allows authors to keep a greater share of the profits.
It really depends on what you want to achieve with your work. If you’re only looking for a wide distribution reach and a proven marketing system, then traditional publishing might be the way to go. If you’re looking to keep most of the profit while having full control over the entire process, then self-publishing is likely the option for you.