Cellular towers and mobile phones all around us, no need to be in aerospace.
And in that case you better tie things hard with low impedance paths instead of using resistors which cannot quench RF interference.
I'd not be so sure about 5 GHz, that connecting pin - essentially small piece of antenna, to ground is more safe. Another end may have 1/4 length to be hardly energized.
I can't comment what kind of SCR is in use nowadays, last time I seen CMOS in X-ray in 90-th. But my understanding, since human body doesn't change much since than, has same charge capacity and lethal for CMOS energy, the same time size of components (MOSFET, shottky diodes ) shrink substantially, means that simple diode-R-diode chain may not be enough to satisfy same ESD standard. So, manufacturers have to incorporate much more sophisticate protection, SCR or whatever.