Yes, and to futher this, the antenna in question appears to have a 2m dipole and a 70cm dipole with a common feedpoint. As mentioned, a 2m dipole will have an ok match on 70cm but the radiation pattern will be skewed up and down wasting energy. If you simply place a 70cm dipole with the 2m dipole, on 70cm RF currents will flow on both dipoles because the 2m dipole is low impedance on 70cm and in effect you will be loading the feedpoint way down to perhaps 25-35 ohm range. I don't know how that antenna would work properly and not light up both dipoles on 70cm. Or maybe it does and they don't mention that....
A simple dipole made of thin elements will not have enough band width to adequately cover the entire 118 to 136MHz comm range of the VHF air band. Whats worse is the UHF air band is 175MHz wide and thin antenna elements are only going to be happy across a very small portion of that. UHF air band antennas usually have elements approaching 2" wide to give enough band width to work across the entire band.
Then you have the same problem as the 2m and 70cm antenna using the same feedpoint, the VHF air band X 3 equals the UHF air band, or in other words, a VHF air band antenna will be 3/4 wave resonant on UHF air and will have a low impedance at UHF and it will load down the feedpoint impedance of the UHF air band dipole. I have no recommendation on how to fix that.
People have made parallel dipoles for HF for decades. They can work ok but you have to mess with the element length and spacing.
If you have a dipole for one band and then another at 3x the frequency (like 2m and 70cm or 120 and 360 MHz) with a common feedpoint then the higher band will have a radiation pattern that is not perpendicular to the antenna and not useful when the antenna is mounted vertically.
There are better ways to make a 2m/70cm dual band dipole.
Something like that will not cover the entire 118-150.8 and 225-400 MHz air bands.