Depending on the niche, this can be true. But it's also generally true that low CaC equals low per-unit pricing and margins. Very difficult to run a business at a consumer-friendly price point without getting to really substantial scale.
For example, Netflix has all the benefits of scale, low cost of capital, etc. and their profit margin is 11% on a service that starts at $9/mo. So if your service has similar pricing power to Netflix, you might need order of 10,000 individual customers to cover a single engineer. And that's after the frequently massive investment required up front to build a product to B2C standards.
In B2B, it's often easier to find some niche that a) is underserved or not served at all, b) is relatively valuable to some set of customers, and c) can be served with a lower quality of finish because it's a business app.
In the B2B space, it's much easier to charge $49/mo, $99/mo, or higher because businesses tend not to be price sensitive in that range. Also, businesses often will need SSO or other "Enterprise" feature and so then you have a $10k+ annual contract for the same service. In this band of self-service B2B SaaS, there is typically not much of a "sales" process. Just post the info on the site and let prospects choose. You can do demos when it makes sense. But nothing like a 1-year intensive sales process. The sales process is closer to B2C, but for more money and less churn.
It's much easier to build a business when you only need to make 50 or 100 sales (and support 50 or 100 customers) to get to profitability.
Honestly, having bootstrapped & sold a SaaS myself, I would not consider bootstrapping anything with a starting price point of less than about $49/mo. And I would only go that low if customers were encouraged to land on a plan at $99/mo or higher.