DFD is just one of many ways to get leads its all about taking action, I am sure you've heard of successful wholesalers like Maxmaxwell who started by DFD and that's what they preach to do.
There are 3 things about what you said above that didn't make sense to me. 1st off you just killed the man dream without going into details about what kind of systems he can set in place, if its about acquiring leads where can he go to acquire those leads, you gave no value man just straight crapped on his question.
2nd One thing you are forgetting is that most people starting in this business doesn't have a lot of money. DFD, posting bandit signs, door hangers, door knocking are the lowest barrier of entry for a beginner. I am a beginner I've only closed 2 deals so you'll probably look at me like what I'm saying is wrong which is fine, but please elaborate on how someone with no money can set up a system and start acquiring leads without paying for an expensive list, CRM and software's. What is your lowest barrier of entry without using DFD or any of those Marketing lead gen?
3rd you don't need a logo on a shirt to sell a property not starting off, I am assuming you've been doing this for a while and you're forgetting probably how you started. Did you go and print apparels and business cards, and get a logo and a website before you started actually trying to get leads? No, I highly doubt that, those things you are talking about are for seasoned Investors after you've closed a couple deals and have the cash to do more complicated stuff like digital marketing, SEO, Website, Email Marketing, hiring cold callers etc etc. If a seller has a problem and we have a solution not having a logo is not going to break the deal.