That is just not true. I have a dual fan 1070Ti and a single fan 2060 super (MSI aero itx), and the 2060S is consistently 10C cooler than my 1070Ti, yet both use the same amount of power despite the 2060S being faster. Fan noise is about the same, though because the 2060S fan is larger the noise is lower frequency and hence less annoying. And that is in a closed case. Fans are less important than heatsink design, and more often than not the number of fans is a marketing decision not a cooling one.
This design NEEDS 2 fans, to have a balanced heat dissipation on the cooling solution.
From the looks of it, it seems to have a similar cooling solution design as a GTX 1050. The GTX 1050 is 75W. This GPU is a lot more.
A 2060, running at 125W has insufficient cooling, with a single open fan (temps under load surpass 75C).
That includes the EVGA triple slot (1 fan) cooler).
I run data centers, they are open design (running in 75-80F ambient).
To keep them cool on stock heat sinks (which all RTX heat sinks are well built, from brands like Zotac, to Asus or Gigabyte), one fan is not enough!
120-170W, with a good heat sink, and back plate to distribute the heat further, needs 2 fans.
170-225W needs 3 fans.
over 225W it's not advised to run GPUs inside an enclosed PC case.
In a PC case, you can't even run 2 GPUs without thermal throttling them.
You can get by with occasional gaming on a single of such GPUs, but I run multiple of them with a sustained load, in an open bench.
The numbers for this are pretty similar to running 1 GPU in a case that has mediocre cooling (like what most store built PCs sold today have).