WMMA is wide open and there isn't a real clear minor league system like with the men. UFC is of the opinion that there are a lot of talented female fighters out there waiting to be discovered.
There is enough of an infrastructure of WMMA to deliver qualified fighters to the UFC. Compare Albu to the other female fighters the UFC has signed:
Germaine de Randamie was only 3-2 when the UFC signed her. But 2 of her wins were in Strikeforce, and one of those was over Hiroko Yamanaka.
Sara McMann was 6-0 but had defeated Shayna Baszler, Tonya Evinger, and Hitomi Akano. She had also won a silver medal in the Olympics in wrestling.
Amanda Nunes was 7-3; but she had 2 Strikeforce fights, 2 Invicta fights, and wins over Julia Budd, Ediane Gomes, and Vanessa Porto.
Liz Carmouche was 7-2, but she was 2-0 in Invicta after going 2-2 in Strikeforce.
Cat Zingano was 7-0 with wins over Carina Damm, Raquel Pennington, Angela Samaro, Barb Honchak, and Takayo Hashi.
Every other female fighter the UFC has signed had at least 9 wins at the time of her signing, except Ronda Rousey, who needed just 6 fights to run through the division and become its undisputed champion. As an aside, Baszler, Roxanne Modafferi, Evinger, and Tara LaRosa had to go through TUF.
Aleksandra Albu comes in with 1 (official) fight against another fighter who was making her (official) professional debut. I see nothing to qualify her as a UFC fighter that would not qualify dozens or even hundreds of other female fighters.
That said, I'm still not saying that Albu can't fight. Maybe she runs through the division and knocks out Ronda. My point is only that, looking at the situation as it is, the signing is perplexing.