Nope. It isn’t ‘deadly to the elderly’. That is a gross exaggeration that implies that every elderly person who catches COVID-19 will keel over, doomed to die.
The reality is that the older the person is, the higher their risk of death, and pre-existing health conditions are an additional risk. That is a very different thing.
Last time I looked at the stats, approx 14% of those over 80 who are tested and found to have the virus, later die - often of complications. This means that approx 86% of them recover.
in addition, it is likely that there are other people who contract the virus whose symptoms are milder, who do not get tested, and who recover without ever being identified as patients. I mean, we surely don’t believe that everyone is being identified. That would be unrealistic.
So, in answer to your question, yes, we should be taking this seriously. Sensible precautions. Regular hand washing. Use of alcohol cleansers. Awareness of our country’s protocols for getting tested, isolation and treatment. Special measures for those at higher risk.
But please, avoid spreading alarmist scaremongering that suggests every elderly person is going to die of it.