Yes, it is possible. But everything has own limits and default Grafana limits are reasonable - max data points = width of the panel:
Nobody is stopping you to use own limit for Max data point
What will you do if you want to show 1M datapoints (e.g. last year of your data)? You will be waiting a few seconds until all data are transferred, then a few seconds until data are rendered, then maybe your browser will be consuming so much memory that your browser/OS will be freezing. Then you will start complaining that Grafana is slow. And that’s only because you have not poor query design. I would avoid any further issues with proper query design now.