You should at least consider investing in Google Ads.
Some practice areas, those that grow by word of mouth and referrals, tend to not do as well with PPC.
These practice areas are largely referral-based and won’t do as well with Google Ads.
It takes so long to optimize an Ads campaign because, when you start, you have no data to work off of.
The best data to use to optimize your campaign is data you collect yourself. So, over time, you can improve your targeting, your creative, and your keywords to really get the most bang for your buck.